Subaru Repair: pressure sensor, barometric pressure sensor, manifold pressure

Question
What is function of the pressure sensor in a Subaru

Answer
Richard,

Your Subaru has more than one pressure sensor.

Which one are you referring to?

Power steering pressure sensor?

Manifold Pressure sensor?

Barometric Pressure Sensor?

Each one has a specific function, and you can learn about the theory and operation in a Subaru Repair Manual.